Maxwell



P. G. DARLING.

LUBRICATING APPARATUS FOR STEAM ENGINES, c.

APPLICATION FILED IUNEZG. IQZO.

@mentali Mar. 8, H2L

5 SHEETS-SHEET I.

I I N P. G. DARLING.

LUBRICATING APPARATUS FOR STEAM ENGINES, ALC.

APPLICATION FILED JUNEZB. 1920.

Patented Mar. s, 1921.

5 SIIEETS-SHEET 2.

- a 0832; Pflf @ar ,any

M, /KM .A MM

P. G. DARUNG. ,LMUAUNG APPARATUS FOR STEAM ENGlNES, Lc.

APPLlCATlON FILED JUNE 26,1920.

Patented Mar. 8, i921.

5 SHEETS-SHEET 3.

Himsa m P. G. DARLING.

LusmcAnNG APPARATUS ma STEAM ENmNEs, Ac.

APPLICATION HLED IUNE 2611920. n 1,370,953 Patented Mar. 8,1921,

P. G. DARLING.

APPLICATION FILED JUNE 26. 1920.

Patented Mar. 8, 1921.

5 SHEETSMSHEET 5.

fnvena Finley; ai'g LumcATrNG APPARATUS FOR STEAM ENGINES, am.

PHILIP DABJLING', F ETL-QQELINE, JEASSACHUSETTS,

MAXWELL a atacan, massa.

Q35' NEW YRKNN. Y., A

ASSIGNOR T0 MANNING, GGRPORLTIQN OF NEW pensionnaire assesseurs renarnesi-internas, ae.

specification of Letters Patent.

.Patented Maia 8, 1921.

Application le Ii'iine" 26, 1920.'.`ferial No. 39,l36t`5.

To all fwlwmz't my concern.'

Be it known that l, FHILIP G. Dimitris, a citizen of the United StatesofAinerica and resident of Brookline, in the county or Norfolk and Stateof Massachusetts, hays invented new and useful Improvements inLubricating Apparatus for. Steam-Engines, &c., of which the following isa specification.

This invention relates to force feed lubricators such as are employedvfor injecting lubricating oil into the steam in the'feed pipe of steamengines and'wliile herein illustrated as adapted particularly Io r usein locomotive practicefi's in many ef its essential features of generalapplication.

While devices of this character are known to the trade, they are in manycases defective 1in practical operation by reason of the dehcacy of theparts employed or their exposure vupon the outside of the casing wherebythey are unfitted for the rough usage, constant and heavy vibration andunavoidable shocks necessarily attendant upon their use` for the purposeintended.

It is also found in practice that by reasoiif'v of the common occurrencein the oil ema' ployed, of sludge, grit or particles of Waste 4or otherfibrous matter, the check valves frequently fail to act, requiring along and laborious operation to dismantle the device forrthe purpose ofclearing the valves.

It is necessary to the successful operation of devices lof thischaracter that the pump reservoir shall always contain oil to a heightabove the-intake of the pump, as otherwise air is forced into the spaceabove the check Y valve, and by reason of the short pump stroke and theheavy back pressure, this air can not be removed except by disconnectingthe discharge pipe, and for this reason it is desirable that the pumpintake be as low as practicable and that the pump be required to liftthe oil through but a short distance 0n the suction stroke.

It is also desirable to provide simple .drive mechanism for thepump'fpiston or pistons which shall be positive in action during the Ypose are installed in pressure stroke and in which there shall be 4noundesirable lost motion between the parts.

Devices commonly employed for the urthe locomotive ca in accessible forinspection d to b d'1 or er e rea 1g t it would be advantaandadjustment,

geous to provide for the automatic regulatire device might be locatedoutside the cab, thus saving space therein, While at the same time suoliautomatic regulation would insure uniformity of oil feed, thuseconomizing oil. n devices of this character it is essential that theterminal check valve commonly installed in the discharge pipeishlll beof simple construction and easily cleaned as well as reliable inoperation, many of the valves now employed failing to give satisfactor fresults. "j

n the` production of a lubricating device .iorthe purpose abovedescribed vthe object in view has which the above noted defects ciesfinthe prior ai't devices are overcome or avoided-and which Will embody allsuch desirable features as may conduce to the successful operation and`continued land unin-` v terrupted 'uselo such a device.

'y Qlo the above end and in accordance with this invention thelubricator may be so constructed as to have all its essential operativeparts entirely inclosedin a Strong and rigid casing having provision forready attachment to the locomotive frame.

The device may also lcomprise a self -contained pump element comprisingthepump cylinder or cylinders with their pistons, the pump intake,clieck valve or valves and a portion of the -oil discharge passages allof which ma be arranged for ready removal as a unit rom the main casingfor cleaning or repairs and Without necessitating the drawing ofi' ofthe oil from the casing.

For actuating the piston or pistons an intermittently rotating shaft maybe em loyed having a cam rrequivalent means or actuating the piston onits pressure stroke and spring means for moving :the piston on itssuction stroke. The intermittent movement of the shaftcan convenientlybe obtained by the use-of .a actuated from some adjacent reciprocatinpart suchas the main steam valve gear, an preferably such 4drive willinclude a loc ratchet to provide against an backward 11otation ,or lostmotion in the s aft.

For simplifying the pump mechanism and for insuring its properoperation" and lfeeding of the oil thereto, the cylinder may be ratchetIor equivalent drive iiov , tages above outlined,

ioeated at a point below near/al levei cil in the casing so that nosuction valve is necessary, thus avoiding one common source lf troublein pumps es ordinarily constructed, while at the Sametime the locationof the operative parts below the normal level of the oil insures aconstant and thor-- ongh lubrication of such parts.

.he terminal check ve in the discharge pipe may be of the ball type buttcinsure proper operation under all conditions this valve may beprovided with a spring pressed stem, the inclosing casing for the valveto the accompanyi Figure l is a elevational view or locomotive, ilthe'device nii ti ion thereto;

Fig. 2 is a t' .nsverse vertical sectional View to enlarved scale, onthe line armi),

nentary diagrammatic the iront portion ot the application oi Fig. 6; i

ig. 3 1s an end elevation from the righthand side of Fig. 2;

Fig. i` is a plan view of the device shown in Fig. 2 on the, line c-dthereof, parts being broken awa-y;

'y Fig. 5 is a crosssection on the line cof Fig. 2;

Fig. 6 is Fig. 2;

Fig. 7 is an 'elevation to enlarged scale,

a section? on the line g-a or docking from the right-hand side of 2,

of the roller ratchet device.

. Fifi. 8 is a view similar to Fie. 2" D L: looking from the yleft-handside of the ratchet device as viewed in 2;

Fig. 9 is a cross-section through the roilerratchet device on the linem-n of Fig. '7; Fig. 10 is a fragmentar 1 side elevation of the driveshaft .showing the mounted thereon; and

; section to enlarged scale throu valve.

Referring to Fig. 1,-1 is the locomotive cylinder, 2'the valve chest,the piston rod, 4 the cross-head, 5 the valve rod, and 6 the steam feedpipe, all of usual and well-known construction. 7 indicates thelubricating de- .vice'forniing the subject matter of this in ventionmounted in position for use upon the locomotive frame7 and 8 indicatesgenerally a reciprocable connection receiving its movement from crosshead, and by reference may had dawing's, in whichgarants lmee-ns ofwhich the moving parts of the lubricating device are actuated.

elierring more particularly to Fig. 2,--10 is a casing of substantiallyrectangular form, open at its upper end and provided with a series oflugs 11 having openings 12 therein through which suitable bolts or otherconnections may be passed for attaching the casing to suitablesupporting means on the locomotive frame. -As the arrangement of the'casing and of the attaching lugs 11 is symmetrical, it is possible tomount the lubricating device upon either side of the locomotive withequal facility. At its bottom the casing is provided with a boss 13having an opening therein normally closed by a plug 14, such openingserving as a con`- venient means for draining oil from the casing ifoccasion arises for so doing. 15 is a vertical rib projecting inwardlyfrom the right-hand wall of the casing as viewed in Fig. 2 and havingtherein a chamber 1G in ich may be mounted a gage glass 17, there anopening at the end of the casing .Y i which the gage glass may beinspected. As seen in Fig. 6, the interior of t" e gage glasscommunicates by means of a 18 with the interior of the casing i0.whereby fiuid contained in said casing is permitted to rise within gageglass. As the gage glass is relatively short and its iower endis wellabove the bottom of the casing, accidental breakage of the glass doesnot occasion the loss 0i all the oil, a suflicient amount remaining inthe lower part of the casing for any reasonable period of use.

The interior w ll of the easing opposite rib lf3 is provided with. alongitudinal vertical rib 20, this rib being cored out to provide asteam chamber 21, whereby the contents of the casing may be kept at "theproper temperature. For admitting to the chamber 2l and for draining thecondensedsteam therefrom, openings 22, and 24 may be provided leadinginto said chamber from the exterior oi? the casing, such openings beingtapped for pipe connections` It is to be understood that but one of theopenings 23, 24 will bein use at one time, the other being closed by asuitable plug, theprovision of two openings, however, 'facilitating theattachment of the drainage pipe regardless of whether the .30 Ithere roma strainer 37 of foraminous marvaees l upon the upper edge of the casingand to be supported thereby. The plate 26, at its right-hand edge `asseen in Fig. 2, has a flange 28 of less depth than the flange 27, andengaging beneath said flange 28 is a j cover member 29 which extendsacross the open top of the casing 10 and rests at 30 upon the upper edgethereof at the opposite side, a lug 31 extending downwardly and againstthe inner wall of the Casin 10 to pro erly position the member 29 reatively to t ecasmg. 31 is a screw passing downwardly through an openinin the cover member 29, and en aging aug 32 integral with the rib 15. ecover member 29 has an upwardly-extending boss 33 provided with anopening .givin access to the interior of the casing 10. wardly from theupper sur ace ofthe cover member 29, and pivotally secured to said lugby means of a pin 35a is a cap 36 which fits down over the boss 33 forclosing the opening therein. The hole in the cover member through whichpin 35a. passes is somewhat lar er than the diameterv of the pin wherebyt e cover is permitted to seat .l Y ltself securely upon the outersurfacev of the boss 33. The opening in the boss 33 is of i relativelylarge extent as compared with the casin 10, and has projectingdownwardly terial, this strainer extendin well down into the casin andforming a arge receptacle :into whic the lubricating me 3,5

lum may be poured- The plate 26 may be secured in position upon thecasing by means of a screw 38 passing through an openn therein andengaging a threaded hole in t e up er .end

f 'of-:therib 20. Extending downward y from the plate26 is a pair oflegs 39, 40, these legs and the parts associated therewith be- `ing ofduplicate construction. In the following description, but one of thelegs with the parts supgorted thereby will be specililcally describeReferring now more particularly to the vleg 39,l numeral 41 indicates achamber extending longitudinally thereof, said-'chami 'ber belng closedat itsupper end by a. plug f42' phuving a passage 43-therein leadin tofa connection 44 to which a pipe," as 45 ig. 1,'may be attached., saidpipe leading to the terminal check-*valve connection 46 (see 11). At itslower portion the lchamber 41`is provided with a pair of ball valves 47,48respectively, said valves being mounted one abovethe other, and actingindependently. 49 is a retainer having screw-threaded ngagement with theinterior of the leg 39,

ssaid retainer serving to limit the vertical rise the ball 47. The lowerend of the leg 39 is provided with a foot 50 which is arranged to beseated between the inner wall of the casing 10 and a lug 51 projectingvertically upward from its bottom wall, such closed by the aforesaidball 48.

point in said pump cylinder 55 intermediateits ends leads a passage 58Ywhich opensv lu 35 extends upfoot, together with the screw 38 Servingto i retain the pump element in proper operative position in the casing.I i

Projecting from the ri `hthand .side of the leg 39 near its lower en isa boss 52, said boss bein provided with radial flanges 53 and 54adjacent its opposite extremities, .and having a central bore 55 whichlserves as a pump cylinder. A The bore 55 is extended at 56 to a pointbelow the chamber 41, and communicates therewith by means of a passage57, the upper endV of which is normally From a into the lower part ofthe casing 10, such passage serving as the pump intake. 59 1s a cyindrical screen or strainer of wire netting or other suitable materialsurrounding the boss 52 and having its ends seated upon the flanges 53,54, respectively. This screen 59 thus mounted serves to inclose theentrance to passage 58 and to form thereabout an annular chamber.

Slidable within the pump 'cylinder is a piston 60 having the-piston-rody'61 integral therewith, it bemg vnoted that the piston- 60 is ofuniform diameter throughout that por- -tionwhich travels within thecylinder. By

while at the same time the slots permit the proper movement of thepiston-rod withinl the guides.

The pistonrod at its right-.hand extremity is provided with an"'enlargedhead 65 forming a shoulder 66 against which one end of a coil spring 67may bear, said spring surrounding the piston-rod and the guides andengaging at its oppositeextremity the Vright-hand end of the boss 52.

68 is a yoke member having a central bore 69 and a downwardly extendmgfin 70. The fin 70 is arranged to slide longitudinally of the casingwithin a guideway 71A formed between upstanding lugs 721 73 secured tothe bottom wall .of the casin ,fand at 74 the yoke is provided with asto'p lug arranged to lcontact with the inner right-hand wall of thecasing (see F ig. 2). The left-hand face oit' said yoke, as viewed in Fi`2, is ro. vided with a pair of bosses 7 Vsee 'also yig.l 4) againstwhich the enlarged heads'oftbe ieo ' Carried by the shaft 76 at a pointmid a stufling box comprising a capi 91 Way of its length is a helicalcam 78 providing a gradual incline 79 which ends in an abrupt shoulder80. This cam is located within a longitudinal chamber 81 in the yokemember, and the latter is provided at a point within said chamber with aprojecting lug or pin 82 arranged for engagement by t cam 78.

The right-hand wall ot the casingil has formed therein a'large opening83 within which is seated a casing 84 having a flange 85 bearing uponthe outer face of the ca'sing 10, said casing 84 having four outstandingears 86 adapted to engage ythe the bosses 25, upon the right-hand outersurface of the casing 10, and to be attached thereto by means of bolts87 or other suitable securing means. The casing 84 also has an inturnedflange 84a at its end adjacent casing 10, said flange being cut away atone point as 84b for a purpose to be described. Tlie other end of thecasing 84 is provided with a reduced portion 88 providing a bearingopening 89 within which may turn a shaft 90, said shaft workin in aaving screw-thread engagement with the portion 88 of the casing. Forholding the cap 91 in adjusted position, a nut lock may be provided,that herein shown consisting of a plate 91a slotted at 91b to take overone of the bolts 87 by means of which it may he fixed in position. Theface end ol plate 91 is .notched out at 91c to engage an angle of the.cap 91 whereby the latter is held in desired position. The inner end ofthe shaft has secured thereto or integral therewith, a flange or collar92 having a series of recesses 93 in its periphery (see Fig. 7), suchrecesses providing substantially flat surfaces 94, 95 arranged at anangle to each other and adapted for engagement by balls or rollers 96.At `one end the recesses are provided with pockets 97 within which areseated coil springs 98 against the ends of which the respective balls orrollers bear. v

Surrounding the outer periphery of the flange 92 is a retainervcup 99having a sub stantially cylindrical inner surface engaging with theballs or rollers. The cup 99 1s provided with a hun 100 having a centralbore within which is seated the right-hand end of the shaft 78 (see Fig.9), the shaft rivets 103 or other suitable securing means z said collarbeing provided with a series o recesses 104 similar in all respects tothe recesses 93 in the collar 92, such recesses being adapted to receiveballs or rollersl 105 which engage the inner surface of the c asing 84;it being noted, however, that the arrangement of the recesses 104 is'theverse of that of the recesses 93. Referring more particularly to Fig. 7,it will be noted that the wall 94 of the recess 93 approaches theinterior wall of the retainer 99, and that the spring 98 tends to forcethe ball or roller 96 toward the narrow endV of the recess. Uponrotation of the flange 92 in the direction of. the arrow in Fig. 7, theball or roller 96 tends'towedge between the surface 94 and the interiorsurvface of the retainer 99 whereby the latter is caused to rotate withthe shaft 90. But upon reversal of the movement of shaft 90 the ball 96moves away from the narrow end of the recess, thus releasing theretainer 99.

In inserting the rollers 9G in the casing 84, 'i

it is simply necessary to bring the recesses 98 successively oppositethe opening 84", whereupon the rollers may be slipped into place, andupon relative rotation'of the parts 99 and 84 the flange84a is brought;

into retaining relation to the rollers, whereby the latter are held inoperative' position. By reason of this arrangement it is possible toremove the entire casing 84 with its inclosed parts with little dangerof losing any of them, the flange holding `the rollers in position andthereby preventing displacement of the other part.. x,

Referring now to Fig. 1, it will be seen that the connection 8 from thecross-head has pivotal connection with the crank arm 106, such crank armbeing secured in any desired manner to the outwardly extending portionof the shaft 90. Al convenientv means for securing suchv crank arm tpthe shaft may consist in forming the crank arm with a split end, asindicated at 107,\ 108, Fig. 2, and providing the shaft 90 with .atangential slot with which may engage the side of a bolt 109 passingthrough the parts Y 107, 108, and by means of which said lparts may beclamped securely about the shaft.90.

he oil from the lubricating device islfed into the steam-feed pipe bymeans of a tube 110 inserted through the wall of said pipe and extendingto a point vsubstantially central thereof, said tube bein'g inclinedsomewhat in the direction of steamv flow to assist in the deli/very ofoil to the steam current.

s it s desirable that the drops of lubri cant in passing into the steambe as minute as possible, it 1s convenient to provide a terminalcheck-valve adjacent the delivery end. of the pipe, such valve beingillustrated in Fig. 11, :in which the valve member is indicated as aball 1111 adapted to seat against a surface 112 formed in a chamberin acasing 113, such valve serving normally to close the passage 114vleading from the delivery t withthe proper lubricant delivery. In orderto keep the valve properly seated under all conditions, it is providedwith a stem 115 surrounding which is a coil spring 11G which may beplacedunder proper initial tension by means of a nut 117 engaging ascrew-thread upon the stern 115. The ter-- minal valve structurecomprises a plurality of parts including casing 113 which may neseparated for proper adjustment of the valve, and with a clean-outopening 11S provided with a plug 119 through 'which theA gfvalve may beand freed from aey cumulated or dirt, necessary'. 35

the openin in the cover plate In the normal operation of thehdevice,being understood that it is mounted thev locomotive frame iu the mannerindie thereceptacle 10 will he filled to desir-ed level with cih-bypouring the latt rrthrough vision of t e very large strainer the rapidlling of the casing, and the pivot-` Aits travel through the pumppassage" ed cap 36 insures the exclusion oi dirt and binders from theinterior of the receptacle, while the location of the steam cl aber 2ladjacent to and extending longitudinally between the legs 39 and 11Ginsures roper heating of the lubricant throng without the nece-ssi y forraising the ia body of fluid Within casing 1G to an i sii-ably highdegree. y

The space at the bottom of the casing below the guides 62'forms a sludgeein ber and the provision of the annular ch ber within strainer 59insures a free 'How o. oil to theinlet paage 58 even if sludge ispermitted' to accumulate inthe bottom o the casing to a level above saidinlet.

Upon operation of the locomotive, moven ment is imparted to theconnection 8 at every reciprocation o the cross-head, and thus, indirect correspondence to the speed of the locomotive, the pump pistonsare actuated, whereby oil is drawn through the y terminal check valve.

passage 58 through `the bottom of therereptacle and forced upwardlythrough the check-valves 47, 18 and into the chamber 41, from `which itiows throughV the passage in plug l2 and the connecting pipe 45 to theWhen the pressurn` becomes suicient, the terminal check valve.' will beopened, and oil will be injected,

drop by drop, into the steam inlet pipe.

As the connection 8 is reciprocated, the

crank arm 106 is rocked, and thereby through the ball ratchet,comprising the parts 92, 96 and 99, the shaft 76 is rocked, in adirection to cause thev cam 78 to move the yoke 68 to the left, as seenin Fig. 2. Such movement of the yoke, acting through the heads ofthepiston rods, serves to move the pistons to the left, thus forcin oilfrom the cylinders and into the cham. er 41, as vabove described,

Upon the reverse oscillation of the crank arrn 106, the driving rollerratchet is idle, but the ratchet. comprising the parts 102, 195 andbecomes active to prevent any reverse movement of the shaft 76.

`When thev pin 82 reaches the position iin-f' dicated by the lefthanddotted circle'I Fig. 10) at the end of the cam incline 79, it ro'ps fromabrupt shoulder 80 to the position indicated by the right hand dottedcircle, and tl i apri immediately return the pist; the pistons,together; `with the ist position ready for a repeiation. Such, reversemovee action o the springs actuto e on their suctionfstrolte.

. pump elem-ent for cleaning .or reis merely necessary to take out and35S-,whereupon the cover 29 i y' r be.-ren'ioverl, and then the pumpelement. com 'sing the plate 26, the legs 52, with, the pump cylin- 6B,thef'pistons andpis- 'the actuating spring 6T, may

ily' he i' of time or labor. served all the operativel parts of themechanism are fully inclosed and below the level ofthe oil in the casing10, the parts l thus beinir very thoroughly lubricated at all times. 'yreason oik the arrangement of the pump oylinderis at a point near thebot- .mr any reason, it is desired to re-I a unit from the' interior of'tom of the casing 10, it is unnecessary to provide the pump with anintake valve as the lubricant always Hows freely into the cylinder inwhich. a vacuum is formed upon each back stroke of the pump sufficientto insure this action.

lVhile as, herein disclosed, the ratchet-- device for operating thedrive shaft has been shown as of a roller clutch variety, it iscontemplated that ratchet device of other and well-known forms may besubstituted therefor lwithout affecting in any substantial manner theoperation of the lubricating device.

-It is furthermore to be understood that Whereas but one pipe 45 hasbeen shown leading from the lubricator, a similar pipe will, in theusual operation of the device, be arrangedto lead to the other cylinderof the locomotive, although it is within the scope of the invention toprov-ide independent lubricating devices for the opposite sides of thelocomotive. templated that under some circumstances, as for example inlocomotives of the com* pound type, it may be desirable to provide acomparatively large number of such delivery pipes leading from thelubricator; and in such cases it may become necessary to provide agreater number of pump cylinders than that shown herein.

l It isalso contemplated that in some cases 1t may be found desirable toprovide for automatically lubricating certain of the mechanical parts ofthe locomotive, or of other machinery; and in such cases, oil from alubrica-tor pump of the type herein disclosed may be led to the pointsof use by means of suitably arranged conduits.

For adjusting the rate of flow of oil it is contemplated that levers 106of various lengths will be provided, the length of the lever determiningthe throw of the ratchet device, under constant ,travel of lever 8. Sucha mode of adjustment is foolproof and can be calculated for any givenset of conditions with great nicety.

Having thus described the invention, together with the preferredembodiment of the same and the mode of use thereof, what I claim anddesire to secure by Letters Patent of the United States is:

1. In combination in a lubricating device, a pump element comprising apair of substantiallyparallel pump cylinders, lpistons arranged toreciprocate in said cylinders, a shaft interposed between said pistons,and mea-ns carried by said shaft for simultaneously moving said pistonsin the same direction.

2. In combination in a device of the classl supported between @slidpistons, a cam upon It is furthermore con# said shaftand.- a camfollower actuable by said cam and. having connection to said pistons forsimultaneous] imparting the pressure stroke to said piston. i

3. In a device 4for lubricating machinery,

' in combination a pump comprisingr a piston,

a rotatable shaft, a helical cam upon said shaft, said cam having agradual rise and an abrupt descent, and :i spring pressed cam followerengageable with said cam, and having operative conneciion with saidpiston.

a. ln a lubricating device, a vpump comprising a plurality of parallelpistons, guides for said pistons, a yoke member constructed and arrangedto contact with the ends of the respective pistons, means for movingsaid yoke member whereby to impart the pressure stroke to said' pistons,and spring means for holding said pistons in contact with said yokemember.

5. In a lubricatingr device of the class described, a casing, apumpelement mounted in the casing, a pump cylinder therein and havingits axis substantially parallel to the bottom Wall of the casing, apiston movable within said cylinder, and a shaft, having its axissubstantially parallel to the axis of the piston, rotatably mounted inthe casing, and means carried by said shaft for actuating the piston.`

6. A lubricating device for steam engines, comprising, in combination, acasing for the reception of lubricating oil, a pump element removablysecured within said casing, said element being provided withla pumpcylinder and with inlet and discharge passages therefor, said inletbeing unpiovided with a valve, a check valve in the discharge passage,

a piston within the cylinder, an intermittently rotatable shaft withinthe casing, and` cam means upon said shaft for imparting the pressurestroke to the piston.

7. ln a pump device, a support, a boss projecting'therefrom. said bosshaving a bore thereii'i constituting a pump cylinder and having anintake passage leading thereto, a screen of foraminousmaterialsurrounding said boss and means for Spacing said screen from said boss.

8. In combination in a lubricating device, a casing, a pump cylinderlocated therein and having its axis substantially parallel 'to' thebottom of the casing, a shaft within the casing and arranffjedsubstantially.parallel to the axis of the pun-ip cylinder, a pistonwithin the cvlinder, a cani upon said shaft, a cam follower upon saidpiston, said cam being constructed and arranged to move the pistonin onedirection only, and a spring for moy/ing the piston in vtheoppositedirection.

9. In combinaties in a lubricating device, a. pump element havingtherein a pair of parallel relatively stationary 'pump cylinders,pistons in the respective cy1inderS,"a

and a spring for moving said follower in the opposite direction. Y

10. In a device of the class described, in combination, a casing havingtherein a. pump element comprising pistons, a shaft rotatable within thecasing and having its 'axis substantially parallel to the axes of saidpistons, connections between said shaft and the pistons for actuatingthe latter, means for intermittently rotatin for locking the sha againstbackward rotation.

11. In a device of the class described, in combination, a support, asubstantially cylindrical boss extending from said support and having afluid intake passage opening throughfits lateral wall, radial flangeseX- tending from said boss at each end thereof, and a cylindrical screensurrounding said boss and having its ends seated upon the respectiveflan es.

12. In a evice of the class described a pum element comprising asupporting mem er, a pair of spaced tubular le de. pending therefrom,and lateral and su sta-ntially parallel bosses extending from therespective legs adjacent their free extremities, said bosses havingparallel bores therein.

13. In a device of the class described a pump element comprising a pairof rigidly connected, substantially parallel legs, said legs havinglongitudinal passageways therein, bosses projecting from the respectivelegs and-having substantially parallel bores therein, and guide membersextending from said bosses and having guiding surfaces substantiallyparallel to the axes of said bores.

14. A device ofthe class described, comrising in combination a tubularsupport, a

oss outstanding laterally from said support and provided with asubstantially cylindrical bore forming a pum cylinder and a pair of saced guide mem ers extendin outwardly rom said boss and provided witguiding surfaces arranged substantially parallel with said bore.

15. A pump element for lubricatin vices comprising in combination'a tuular member having a supporting flange adjacent its upper end, a footextending downwardly from its lower end, and a boss projecting laterallyfrom said member and provided with a substantially cylindrical boreconstituting a pump cylinder. l

16. In a lubricating device, a pumpl comprising a plurality ofcylinders, pistons in said cylinders, guides for the respective pistons,a piston actuating yoke cngageable with the outer ends of the severalpistons, mechanical means for moving'said yoke, and

the shaft, and means dei therethrough the pistons, -in one direction,

and springs engaging each of said pistons for moving them in the oposite direction.

17. In a-lubricatingfcgvice', in combination, a pump comprising aplurality of substantiall parallel pistons, a yoke member engagea lewith the outer ends of said pistons, a guide for said yoke member, a camfor moving said yoke, and springs surrounding each of said pistonsformoving them in a direction opposite to that imparted by the.

o re. y 1S. in a lubricator, a pump element comprising a member having apum cylinder formed therein, a piston in vsai c linder, a pair ofsubstantially parallel guides extending rom said member and having slotstherein, and a key member projectin from said piston and engaging withlnsai slots. 19. In a device of the class described, in

combination, a pump elementv comprisin av pump cylinder, a pistontherein, a dnve shaft for actuating said piston, means forintermittently actuating said shaft comprising a roller ratchet, and asecond roller ratchet for engaging said shaft and con, structed andarranged to prevent rearward rotation thereof.

20. .ln combination in a lubricating device, a casing, a pump mechanismhaving a portion lying closely adjacent a'side wall l land its cylinderlying closely adjacent the bottom wall of said casing, a cover for saidcasing having an opening of relatively large diameter giving access tothe space above and to one side of the pump mechanism,`and a strainer oflarge diameter extending downwardly into sald space from the opening.

a1. In a lubricating device, a casing, a pump element therein comprisinga member providing a horizontally,7 arranged cylinder with inlet anddischarge ports therefor, a. piston,. guides for the piston, and s ringmeans for moving-said piston in one irection and actuating mcha-nismlocated within said casing for movi g the piston in the oppositedirection, said pump element being constructed and arranged whereby itmay be removed from the casing as "a unit without disturbing theactuating mechanism.

22. In a lubricating device a casing forming a cistern for oil, a pumpdevice within said casing comprising a piston and c 1in-- der, saidpiston and cylinder bein orizontally arranged and lying below t e normallevel of oil in said cistern and means for supporting said piston andcylinder within the casing constructed and arranged to permit removal ofsaid piston and cylinder from the casing as a unit without draining theoil therefrom. n 23. In combination in a lubricating device of the classdescribed, a pump element comprising a pump cylinder and a dischargepassage therefrom, check valves located within said discharge passage, adischarge pipe leading from said passage, and a termnal check valvewithin said discharge pipe, said valve. comprising a ball, a stemtherein, and a heating element located adjan cent said pump device andarranged suhstantially parallel to said passageway.

vided with a pair 0f spaced apart legs having longitudinal fluidpa'ssageways therein,

and a membel` arranged between said legs and substantially parallelthereto and provided With a chamber for the reception of a heatinv'lmedium. f

SignedD by me at Boston, Massachusetts, this fifth day of June 1920.

l PHILIP G. DARLING.

